The premium version of the Xperia XZ2 presented today features dual camera technology for better light sensitivity, which Sony already presented at the Mobile World Congress. The images of two Motion Eye camera modules are merged into one photo or video by a new AUBE Fusion image signal processor. The main camera with its 19MP 1/2.3" Exmor RS Stacked Sensor, combined with a (Kb-equivalent) F1.8 25mm G lens, provides the colour information. The accompanying camera module works in black and white and thus only captures brightness information. The sensor of the same size resolves with 12MP, resulting in slightly larger senses (1.55μm instead of 1.22), with a G-optic with F1.6 in front.
Taken together, images should look good even in low light -- Sony names ISO values of 12800 (video) and 51200 (photo) for orientation. As with the Xperia XZ2 (without Premium), slow-motion recording with the XZ2 Premium at up to 960fps in FullHD is possible, whether here too only for 0.1 seconds or even longer, is not visible in the data. Whether and how the 4K HDR film mode differs from www.slashcam.de/news/single/Smartphone-mit-10bit-HLG-Aufnahme----Sony-Xperia-X-14184.html (10bit Hybrid Log Gamma Option (HLG) of the Xperia XZ2) is also unclear. The 5-axis image stabilization seems to be at least the same (only available up to FHD 30fps)
However, the TRILUMINOS display resolution is significantly higher, at 2160 x 3840 (i.e. 4K instead of FHD for the non-premium model). You can also view HDR videos from Amazon Prime Video or Netflix.
The Sony Xperia XZ2 Premium will be released in summer at a price not yet mentioned; the normal Xperia XZ2 costs 799 Euro.